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an actinoelectricity

At a photoeffect the electron which is on a shell of atom of substance, immerses energy of quantum E γ and as a result takes off from atom, having energy Ee '. Where Ii-energy of ionisation of a shell where there was an electron.

Calculation of section of photoelectric uptake is an uneasy problem. In the nonrelativistic approach the following formula grounded on approach of Born [25] is used:

Where and - a stationary value depending on thin structure of level; f - the correctional factor, g - electron radius.

Apparently from (3.5), the photoeffect section depends in the core on a charge of atom Z and promptly decreases from energy of gamma-quantum E γ. In the relativistic approach the photouptake section registers in a following view:

In practice generally calculation of section of photouptake is grounded on use of tabular data in various energy intervals.

The atom after excitation practically instantaneous (10 ' 13-10 ' 16с) lets out one or several gamma-quantums of fluorescent radiation as a result of filling of vacancy from other, more remote level. As the photoeffect in the core occurs on K-level electrons occurrence of characteristic radiation of a K-series has a high probability. Energy and the relative intensity of such transitions for devices Cd, Those and Zn are shown in tables 3 [26]. It is considered, that quantum

Characteristic radiation equality probability can take off in any direction. Therefore it is easily possible to consider in calculations possibility of its uptake in the detector, or a start from it (with formation in a spectrum of so-called peaks of a start).

Table 3 1. Energy of characteristic radiation Kotи Кpдля Cd

Transition Energy (keV) The relative intensity
CdKa3 22.69 0.001
CdKa2 22.98 24.6
Cd Kal 23.17 46.0
Cd Kβ3 26.06 3.98
Cd Kβi 26.1 7.68
Cd Kβ5 26.30 0.06
Cd Kβ2 26.64 1.99
Cd Kβ4 26.70 0.46

Table 3,2, Energy of characteristic radiation of a K-series for Those

Transition Energy (keu) The relative intensity
TeKa3 26.87 0.002
TeKa2 27.2 25.3
Those Kal 27.47 47.1
Those Kβ3 30.94 4.25
Those Kβl 32.0 8.19
Those Kβ5 31.24 0.08
Those Kβ2 31.70 2.37
Those Kβ4 31.77 0.36

Table 3,3, Energy of characteristic radiation of a K-series for Zn

Transition Energy (keu) The relative intensity
Zn Ka3 8.46 3.7∙10 ' 5
Zn Ka2 8.62 14.6
Zn Kal 8.64 28.7
Zn Kb3 9.57 1.79
Zn Kbi 9.57 3.47
Zn Kβ5 9.65 0.01
Zn Kβ4 9.66 4.8 ∙ IO ' 7

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A source: SMIRNOV Alexander Aleksandrovich. Electrophysical performances of detecting structures on the basis of CdTe and CdZnTe. The dissertation on competition of a scientific degree of the candidate of physical and mathematical sciences. Tver - 2018. 2018

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